-er c-- ccc ccd cce ccf ccl ccr ccs ccu cdc cdd cde cdf cdl cdr cds cdu ce- cec ced cee cef cel cer ces ceu cfc cfd cfe cff cfl cfr cfs cfu cl- clc cld cle clf cll clr cls clu crc crd cre crf crl crr crs cru csc csd cse csf csl csr css csu cuc cud cue cuf cul cur cus cuu dcc dcd dce dcf dcl dcr dcs dcu ddc ddd dde ddf ddl ddr dds ddu de- dec ded dee def del der des deu dfc dfd dfe dff dfl dfr dfs dfu dl- dlc dld dle dlf dll dlr dls dlu drc drd dre drl drr drs dru dsc dsd dse dsf dsl dsr dss dsu duc dud due duf dul dur dus ec- ecc ecd ece ecf ecl ecr ecs ecu ed- edc edd ede edf edl edr eds edu eec eed eee eef eel eer ees ef- efc efd efe eff efl efr efs elc eld ele elf ell elr els elu erc erd ere erf erl err ers eru es- esc esd ese esf esl esr ess esu eu- euc eud eue euf eul eur eus fcc fcd fce fcf fcl fcr fcs fcu fdc fdd fde fdf fdl fdr fds fdu fec fed fee fef fel fer fes feu ffc ffd ffe fff ffl ffr ffs ffu flc fld fle flf fll flr fls flu frc frd fre frf frl frr frs fru fsc fsd fse fsf fsl fsr fss fsu fud fue fuf ful fur fus fuu lcc lcd lce lcf lcl lcr lcs lcu ldc ldd lde ldf ldl ldr lds ldu lec led lee lef lel ler les leu lfc lfd lfe lff lfl lfr lfs lfu llc lld lle llf lll llr lls llu lrc lrd lrf lrr lrs lru lsc lsd lse lsf lsl lsr lss lsu luc lud lue luf lul lur lus luu rcc rcd rce rcf rcl rcr rcs rcu rdc rdd rde rdf rdl rdr rds rdu re- rec red ree ref rel rer res reu rfc rfd rfe rff rfl rfr rfs rfu rlc rld rle rlf rll rlr rls rlu rrc rrd rrf rrl rrr rrs rru rsc rsd rse rsf rsl rsr rss rsu ruc rud rue ruf rur rus ruu scc scd sce scf scl scr scs scu sdc sdd sde sdf sdl sdr sds sdu se- sec sed see sef sel ser ses seu sfc sfd sfe sff sfl sfr sfs sfu slc sld sle slf sll slr sls slu sr- src srd sre srf srl srr srs ss- ssc ssd sse ssf ssl ssr sss ssu suc sud sue suf sul sur sus suu ucc ucd uce ucf ucl ucr ucs ucu udc udd ude udf udl udr uds udu uec ued uee uef uel uer ues ufc ufd ufe uff ufl ufr ufs ufu ulc uld ule ulf ull ulr uls ulu ur- urc urd ure urf url urr urs uru usc usd use usf usl usr uss usu uuc uue uur uus uuu